"One Piece at a Time" is a country novelty song written by Wayne Kemp[1] and recorded by Johnny Cash and the Tennessee Three in 1976.

Beginning almost immediately, the narrator and a co-worker decide to "steal" a Cadillac by way of using their assembly line jobs to obtain the parts via salami slicing.

Because automakers inevitably make numerous changes to their models, designs and parts over the course of a quarter-century, the result was a hodgepodge of parts from different years and models that did not fit together well (for example, the bolt holes disappear when attempting to fit the 1973 engine with a 1953 transmission, and there was only one right headlight and two left headlights, and only one tail fin).

The song ends with a CB radio conversation between the narrator and a truck driver inquiring about the "psychobilly Cadillac", in which the singer replies, "you might say I went right up to the factory and picked it up; it's cheaper that way".

The verses are done in a talking blues style; Cash had used a similar spoken-word format and chord progression in his earlier hit "A Boy Named Sue.

This car was made at the behest of Bill Patch of Welch, Oklahoma, and constructed by Leland Mayfield, Harley Malone, Eldon McCoy and Don.

[7] An attempt at building a vehicle "one piece at a time" was completed successfully over a five-year period by a Chinese motorcycle assembly line worker in Chongqing.